Title:
WASHER AND FASTENING STRUCTURE, AND FASTENING RELEASE METHOD
Document Type and Number:
WIPO Patent Application WO/2023/053422
Kind Code:
A1
Abstract:
The present invention enables easy loosening for the purpose of maintenance or the like, without causing loosing in a fastened state. This fastening structure is for fixing an attachment object (11) to a to-be-attached member by applying a nut (1) to a leading end of a screw rod (12) with a washer (2) therebetween. The nut (1) is provided with a first surface (1A) having a plurality of inclined surface portions (1Aa) formed along the circumferential direction such that the height thereof gradually decreases in the tightening rotation direction. The washer (2) is provided with a second surface (2A) having a plurality of inclined surface portions (2Aa) formed along the circumferential direction so as to correspond to the respective inclined surface portions (1Aa) of the first surface (1A). The washer (2) and the nut (1) are vertically overlapped and attached to each other such that the inclined surface portions of the first surface (1A) and the inclined surface portions of the second surface (2A) engage with each other. The external forms of the nut (1) and the washer (2) coincide with each other along the circumferential direction in a state where the inclined surface portions (1Aa) of the first surface (1A) and the inclined surface portions (2Aa) of the second surface (2A) engage with each other without a gap.
Inventors:
SAEKI HIROSHI (JP)
Application Number:
PCT/JP2021/036329
Publication Date:
April 06, 2023
Filing Date:
September 30, 2021
Export Citation:
Assignee:
NIPPON PLARAD CO (JP)
International Classes:
F16B43/00; F16B39/24
Domestic Patent References:
| WO2020174790A1 | 2020-09-03 |
Foreign References:
| JPS3813605Y1 | ||||
| US5011351A | 1991-04-30 | |||
| JPS5259868U | 1977-04-30 | |||
| JP2021095991A | 2021-06-24 | |||
| JPS5213356U | 1977-01-29 |
Attorney, Agent or Firm:
TORISU Minoru et al. (JP)
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